1963 Dodge Dart 270 Convertible for the Wife

The Satellite had 4.10s it with a 383. Fine for central NY (and yes FUN) but in Az with 50 miles of 65-75 to get to town not as fun! The Dart has 3.23s and that is even pushing it in the interstate at 75/80. It is wound up really good. The other cars have 2.94s which are nice to just roll.
The 3.23 is even high for the slant 6?